Bell believes the defense, which finished 12th in yards allowed, 17th in points surrendered and fourth in takeaways in 2012, will have more success in 2013 as long as everyone gets the mental aspect of the scheme down.

Furthermore, he's very confident that the Cardinals, who won just five games last season, will be much improved this time around.

"I think we're going to be a very good football team, I really do," he said. "Just from watching us at practice, the way we work.

"Coach Arians coming in and just getting his message across and guys buying in."

Bell says the team has bought in, which is one of the most important aspects of a franchise turning things around.

"Guys buying into the message, going out there working hard every day trying to get it right," he added. "If we do those things and continue to get better every day, we'll be a good football team."